<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary">
                        添加角色
                    </el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="rolesList" stripe border>
                <el-table-column type='expand'>
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1===0?'bdtop':'']" v-for ="(item1,i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">
                                    {{item1.authName}}
                                </el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                               <el-row :class="[i2===0?'':'bdtop']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                   <el-col :span ="6">
                                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                                        {{item2.authName}}
                                        <i class="el-icon-caret-right"></i>
                                    </el-tag>
                                   </el-col>
                                   <el-col :span ="18">
                                       <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                        {{item3.authName}}
                                       </el-tag>
                                   </el-col>
                               </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <el-table-column type="index"></el-table-column>
                <el-table-column prop="roleName" label="角色名称"></el-table-column>
                <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
                <el-table-column label="操作">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                        <el-button type="warning" icon="el-icon-setting" size="mini" @click="showsetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <el-dialog
            title="分配权限"
            :visible.sync="dialogVisible"
            width="50%"
            @close="setRightDialogClosed"
            >
            <el-tree
                :data="rightsList"
                :props="treeProps"
                default-expand-all
                node-key="id"
                show-checkbox
                :default-checked-keys="defKeys"
                ref="treeRef">
            </el-tree>

            <span slot="footer" class="dialog-footer">
                <el-button @click="dialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>
export default {
    data(){
        return {
            rolesList:[],
            dialogVisible:false,
            rightsList:[],
            // 树形控件绑定的属性
            treeProps :{
                children:'children',
                label : 'authName'
            },
            //默认选中的节点id值
            defKeys : [],
            roleId:''

        }
    },
    created(){
        this.getRolesList()
    },
    methods : {
        async getRolesList(){
            const {data : res} = await this.$http.get('roles')
            if(res.meta.status !== 200){
                return this.$message.error('获取列表失败');       
            }
            this.rolesList = res.data
        },
        async removeRightById(role,id){
            const result = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if(result !== "confirm") {
                return this.$message.info('已取消删除')
            }
            const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${id}`)
            if(res.meta.status !==200){
                 return this.$message.error('删除失败')
            }
            this.$message.success('删除成功')
            role.children = res.data
        },
        async showsetRightDialog(row){
            this.roleId = row.id
            this.getLeafKeys(row,this.defKeys)
            const {data : res} = await this.$http.get('rights/tree')
            if(res.meta.status !==200){
                 return this.$message.error('获取失败')
            }
            this.rightsList = res.data
            this.dialogVisible = true
            
        },
        getLeafKeys(role,arr){
            if(!role.children){
                return arr.push(role.id)
            }
            role.children.forEach(item => {
                this.getLeafKeys(item,arr)
            });
        },
        setRightDialogClosed(){
            this.defKeys = []
        },
        async allotRights(){
           
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(",")
            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
            if(res.meta.status !== 200){
                return this.$message.error('添加失败')
            }
            this.$message.success('分配权限成功')
            this.getRolesList()
             this.dialogVisible = false
            

        }
    }
}
</script>
<style lang="less" scoped>
    .el-tag {
        margin:7px;
    }
    .el-row {
        display:flex;
        align-items:center;
    }
    .bdbottom{
        border-bottom:1px solid #ccc;
    }
    
    .bdtop {
        border-top:1px solid #ccc;
    }
</style>